Solve the problem.A boat heads upstream a distance of 30 miles on the Mississippi river, whose current is running at 5 miles per hour. If the trip back takes an hour less, what was the speed of the boat in still water? Give the answer rounded to two decimal places, if necessary.
A. 18.03 mph
B. 15 mph
C. 16.58 mph
D. 6 mph
Answer: A
Mathematics
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Find the interval of convergence of the series.
A. 2 < x < 8 B. -8 < x < 8 C. 4 < x < 6 D. x < 8
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Solve. Write the fraction in simplest form.Raya's Cinema received $3872 in movie admission tickets for one day. About 
of this amount was for G-rated movies. Find the amount of money received from G-rated movies.
A. $352 B. $704 C. $176 D. $21,296
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Solve.(2x + 2)2 = 16
A. 1, 3 B. 1, -3 C. 0, 1 D. 9, -9
Mathematics
Without graphing, find the maximum value or minimum value.f(x) = 0.25(x + 9)2 - 6
A. 8 B. -6 C. 9 D. 10
Mathematics